<template>
	<div class="selection-component">
		<div class="selection-show" @click="toggleDrop">
			<span>{{ selections[nowIndex].label}}</span>
			<div class="arrow"></div>
		</div>
		<div class="selection-list" v-if="isDrop">
				<ul>
					<li v-for = "(item,index) in selections" @click="chooseSelection(index)">{{ item.label}}</li>
				</ul>
		</div>
	</div>
</template>
<script>
export default{
	props: {
		selections: {
			type: Array,
			default: [{
				label: 'test',
				value: 0
			}]
		}
	},
	data(){
		return {
			isDrop: false,
			nowIndex: 0
		}
	},
	methods: {
		toggleDrop(){
			this.isDrop =  !this.isDrop
		},
		chooseSelection(index){
			this.nowIndex = index
			this.isDrop = false
			this.$emit('on-change',this.selections[this.nowIndex])

		}
	}

}
</script>

<style scoped>
.selection-component {
  position: relative;
  display: inline-block;
}
.selection-show {
  border: 1px solid #e3e3e3;
  padding: 0 20px 0 10px;
  display: inline-block;
  position: relative;
  cursor: pointer;
  height: 25px;
  line-height: 25px;
  border-radius: 3px;
  background: #fff;
}
.selection-show .arrow {
  display: inline-block;
  border-left: 4px solid transparent;
  border-right: 4px solid transparent;
  border-top: 5px solid #e3e3e3;
  width: 0;
  height: 0;
  margin-top: -1px;
  margin-left: 6px;
  margin-right: -14px;
  vertical-align: middle;
}
.selection-list {
  display: inline-block;
  position: absolute;
  left: 0;
  top: 25px;
  width: 100%;
  background: #fff;
  border-top: 1px solid #e3e3e3;
  border-bottom: 1px solid #e3e3e3;
  z-index: 5;
}
.selection-list li {
  padding: 5px 15px 5px 10px;
  border-left: 1px solid #e3e3e3;
  border-right: 1px solid #e3e3e3;
  cursor: pointer;
  background: #fff;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;

}
.selection-list li:hover {
  background: #e3e3e3;
}
</style>
